Sai

The thirteenth leader of the Happo Navy and Chinjao's grandson, a master of the Hasshoken martial art; 3rd division of the Grand Fleet.

Sai, the young and upright heir of the Happo Navy, fought in the Dressrosa tournament and against the Donquixote; he ended up reluctantly engaged to Baby 5, and pledged loyalty to Luffy leading the Grand Fleet's 3rd division.